If you want flat-front and pocketless, you need to he looking at makes wih a side zip. They are usually the more tapered trousers. Whistles and Jigsaw spring to mind. The material is often a bit stretchy but not clingy.
Any idea where I can buy flat front trousers or trousers with no pockets?? Maybe I’m not looking in the right shops?? Any ideas, please 😊 Thank you